| Current Resin System | Desired Resin System |
| Focus: initial thermal shock, not constant heat | Remains white through assembly and lifespan |
| Tend to brown over time | High reflectivity to enhance performance |
| Not developed as LED reflecting surface | Result: lower power consumption |
Solution: White Hot Temperature LED Soldermask
During the past two years a number of LED white soldermasks have been introduced. Unfortunately, we didn't see much of an improvement.
As a result, we innovated our own solutions and identified two offerings demonstrating significant improvements.
Achieving SuperWhite Soldermask While Resisting Browning
One way to achieve a "SuperWhite" soldermask that resists browning is to apply a second coat of thermal cured white soldermask over the LPI.
However, this can cause a concern that the second coat may impede the thermal dynamics of the PCB surface.
Based on the thermal images below comparing a single coat of LPI to a board with a secondary coat, we can see that this is a non-issue.